Process for improving paper yarn.



UNITED STATES PATENT oEEIoE.

MARTIN HOLKEN, OF BARMEN-RITTERSHAUSEN, GERMANY, ASSIGNOR, BY MESNEASSIGNMENTS, TO FIIRST GUIDO VON DONNERSMAROK, OF

NEUDECK.

PROCESS FOR IMPROVING PAPER YARN.

No. 805,553. Specification of Letters Patent. Patented Nov. 28, 1905.

Application filed April 10 1905- Serial No. 254,719.

To all whom it may concern/.-

Be it known that I, MARTIN HoLKEN, a subject of the King of Prussia,German Emperor, and a resident of Barmen-Rittershausen, in the Provinceof the Rhine, German Empire, have invented a new and useful Process forImproving Paper Yarn, of which the following is an exact specification.

My invention relates to improvements in a process for improving paperyarn. In the processes hitherto known it was not possible to strengthenthe paper yarn and to protect it against moisture in the finishingoperation. Many difiiculties occur in finishing paper yarn, as it is notadmissibleto soften the yarn wherebya loosening of the connection wouldarise, and at the finishing of interwoven yarns a sticking together ofthe paper threads would easily take place. For these reasons I employthe following process, consisting therein that the paper yarn is onlyfor a short time soaked in the finishing material and is thenimmediately treated in a brushing-machine, the brushes of which aresupplied with paraffin or the like, being either in a liquid or solidstate. The yarn in strands or also the single threads may be treated insuch a manner. It is of special importance that the yarn immediatelyafter the Wetting in the finishing mass is brushed, thereby preventing aloosening of the paper yarn, in which case the yarn would not withstandthe tension necessary for the further working. By this immediatebrushing it is further obtained that the paper threads, soaked in anadhesive substance, do not stick together.

The process is practiced in the following manner: The paper yarn woundup in hanks is dipped for a short time only into the finish ing mass,which may consist of glue, deXtrine, potato-starch, or any otheradhesive substance, to which oil, fat, or soaps may be added in case asoft yarn is to be obtained. After the wetting the yarn is immediatelybrought toa brushing-machine and is brushed under tension, while thebrushes are supplied with parafiin, wax, fat, or a similar substance. Inthis manner the superfluous finishing is removed or provided with acover, whereby the paper threads receive their necessary smooth surface,and at the same time a consistency of the threads is obtained by thebrushing of the threads under tension.

Having thus fully described the nature of this invention, what I desireto secure by Letters Patent of the United States is- The process forimproving paper-yarn, consisting therein, that the yarn is for a shorttime dipped into a finishing material and is immediately thereaftertreated under tension in a brushing-machine, the brushes of which aresupplied with paraflin, wax, fat or the like, substantially as describedand for the purpose set forth.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

MARTIN HOLKEN.

Witnesses HENRY HAsrER, WOLDEMAR HAUPT.

